Round-seam expander for making sheet-metal water-pipe.



PATENTED AUG. 6,-1907.

L v c. H. BoeAPgr, ROUND'SEAM BXPANDER FOR MAKING SHEET METAL WATER PIPE.

APPLICATION FILED MAB. 14,1906.

UNiTnD STA ES PAEENT FI CHARLES HENRY BOGART, or LOS ANGELES, CALIFORNIA.

noUNn-sEAM ExPANpna FQR AMAKING SHEET-METAL, WATER-RIPE.

To all whom it may concemr Be it known that I, CHARLES HENRY Boean'r, a citizen ofthe United States, residing at Los Angeles, in the county of Los Angeles and State of California, have in- 'vented a new and 'useful Round-Seam Expander'for Making Sheet-Metal Water-Pipe, of whichthe following is a'specification,

An object of this invention is to provide means for v doing away with a large portion of the rivetingand punching that is now necessary in uniting the joints of sheet-metal water-pipe largely used on the Pacific coast. I

Heretofore it has been the practice to rivet together a number of'joints, usually seven or tenjoints each thirty inches long, to form what is termed a pipe section, and the pipe is finally laid in a trench and fitted for use by telescoping and driving the ends of the sections together to make a continuous water-tight ,pipe.

By my invention I propose to unite the joints of pipe 2 0 in a new way that is cheaper than the old, and that will produce pipe equally as good as, and cheaper than that produced.by the old way. This I do byproiiding a machine that will interlock the ends of two joints ofa pipe so that they cannot be pulled apart, jand-I also providefor making the round seam joint practi-' cally water-tight by expanding the insertedjoint out- "ward. I also provide a channel to. receive rivets for riveting the joints together at the round seam. I deem this invention, pioneer withrespect to each ofthese three features. I v I regard this invention as pioneer in that I have constructed a novel machine for making sheet metal pipe .by forming water tight round seams between the joints.

In carrying out the invention I have-constructed a round seam expander for making a sheet metal water pipe comprising two shafts, each supported at one end and free at the dther end, providing meansfor causing relative'movement of the free ends of said shafts towards and from each other, providing the free'ends of said shafts with beading means and swaging means, the.-

beading'means being between the swaging means and i the supported ends of the shafts and providing means for rotating said beading and swaging means.

I am aware that machines, such as shown in the patent to Sargent, No. 142,945, have been provided for corrugating and beading sheet metal pipe, but my invention is an improvement over such machines in that my machine above mentioned is capable of producing a round seam uniting two pipe joints whereas the patented me.-

chine is only capable of forming the ends of the pipe joints, so that they may telescope together. i p The accompanying drawings illustratethe invention: Figure 1 is an elevation of a machine embodying this invention. Fig. 2 is an elevation of thesame from the left of Fig. 1. Fig. 3 is a plan of the machine, broken Specification of Letters Patent. Application illedMarch 14, 1906. I Serial Not 305,963.

Patented Aug. 6, i907.

to expose parts otherwisehidd'en. Fig. 4 is a section on line x :r Fig. 1 looking right. Fig. 5 is an enlarged sectional detail of-the tips of the seaming rollers in use forming a seam between two pipe joints, fragments of which are shown. Fig. 6 is an enlarged,,fragn1ental cross-section of the same on line it, Fig. 5.

1 .is the base of the machine which may be of cast iron or any other suitable material.

2 is the lower beading shaftmounted atone end in boxing 3 on said base 1" and supported bytworollers 4 between the journaled end 5 of the shaft 2 and the free end 6 thereof such free end constituting a beading and swaging roller with beads 7 and 8 and with a milled portion 9 at the extreme end. Said heads 7 and 8 and the milled portion 9 may be constructed on a sleeve .10 on the end of the lower beading shaft 2 11 designates the upper beading shaft driven by a driving pulley 12 and supported by apivoted boxing 13, loose boxing 14 and 15, and connected'by gearing 16, 17, with the lower beading shaft 2. Shaft 11 is provided with a beading rollerl8 having grooves 19 tocorrespond with the beads 7 and 8 of the lower beading and beading and'swaging roller, excepting that the indentations are slight, the same being intended only to assist in turning the pipe-joints as the work proceeds.

The milled portions 9 and 20 of the two rollers constitute swaging means; the portion 20 serving to support the pipe against the. thrust of the more deeply-milled- 'portion 9. The portions 7, 8, and 19 of the beading rollers constitute interlocking beading means for beadmg the ends of the pipe-joints together, with two beads having a channel between, them to receive the ends of rivets which may be employed to hold the joints together before the beads are formed The undershaft 2 is approximately of the same diameter as the channeled portion of the swaging and beading means, so

that when a-sec tion of. pipe is inserted between said shafts in thespace between the beading and swaging means and the support of said shaft, the main body of a said section will rest upon and be supported by said undershaft.

swaging roller, and also provided with a milled portion 20 corresponding to the milled portion 9 .of the lower 21 is a tension screw adapted to apply pressure to the free end of shaftll toforce the top beading roller toward the lower beading roller.

joints will be rotated, beads 24 will be formed in a round seam, and the inside lap will be expanded toward the outer joint 22 by means of the milled portion 9. I

The gearing l6, 17, causes the two rollers to rotate together to turn the joints and produce the beading and expanding. The teeth of the gears have suflicicnt play to allow the necessary "movement of the rollers i Owing to the lower shalt having a. periphery wh ch is un'obstructed-from the bending and swnging means at the outer end thercol', all the way inwardl y to the support thereof located solely at its inner end, the whole two joints. The milled portion 20 ol the outer shaft 11 Ljoint.

Whenthe requisite number of joints havo been 0);- panded together to l'orni a'section the same will be dipped in asphaltuln in the usual way of manufacturing pipes. p

to swage the sheet metal outwardly inside the joint to make a tight seam comparatively smooth on the insidef length of an ordinary joint of pipe may be placed on the lower shalt in contact with its movingperiphery v to be properly rotated during the operation ol'uniting is not suiliciently deep to swage the outside lap of said In order to produce a water tight round seam at the I joint great rigidityagainst the down thrust from the screw 2]. isnee'essary upon the part of the beadingwork alternately fIOliYtWObPGIiLtOlS each of whom may have astake-oi the usual kind, not shown, on which he will assemble two joints while the other operator will be expanding an'dlbeading together another two joints, and so on. y i

The sheet metal used for making pipe on this machine may be. otany character in common use for inaking sheet metal water-pipe. The same may be from No. 1(i to as heavy as 3/16 of aninch thick sheet steel 7 or other suitable sheet metal.

l have found it advisable in the process of manufacturing pipe with this machine to fasten the joints as 22 and 23 by alew rivets, as 39, before the -joints are placed onthe beading shaft 2. The beading shafts 2 and 1'] are provided with annular ways or grooves 28', 29 to receive the ends of rivets between the portions of said shafts which form the beads 2d of the round seam,

the purpose of said rivets being to insure against any displacement of the joints during the process of e);-

panding. V

The milled portion 9 oi the; heading shaft 2 is of suilieient depth to swage and expand the end of the inner lap of the round seam, so that a close connection will be formed between the inner andouter joints, thus in- 'suring great strength of the sea'rns in the pipe sections.

Owing to the beading means of shaft 2 being located between the supported end and the milled portion at the outer end of said shaft, the milled outer end of said shalt ismade to engage the extreme end portion 01 onev section of the-pipe inside the joint, thus expanding the same against the end portion of the other section to form a tight joint. I

This construction makes impossible shaft Z-a'ndin order to effectuate the desired result the antifriction rollers 4 areinounte d under said beading shaft 2 as near the beads as possible.

What I claim is'.;- v 10A round seammachine adapted to interlock sections of pipe to form a sheet'metal pipe, comprising a base, supporting rollers mounted in said base, boxingon said base, a

shaft and the free end thereof, such free end being-provided with two juxtaposedbeads and a milled portion, .another beading shaft interlocking, with said beads, a. space body of a section of pipe whereby two sections of pipe may be united with around seaminterlocking two pipe sections together, a pulley for driving one of said heading shafts, pivoted and loose boxing for supporting said slinftfand gearing connecting the two shafts.

2. A machine for niakinground seams of sheet metal watcr'pipe comprising'two beading shafts'eachof which; is provided with a milled portion and one of which is movable toward and fronrthe other, said shafts being provided with that is movable toward and from the other being of less depth than the milled portion of the othershaft; and the the inside lap of around seam between'fwo joints of pipe.

Los Angeles, California this Ttb day of March 190d.

CIlhRLES HENRY BQfiAR'l.

- In presence oi-- I i .TA'ims R. TOWNSEND, JULIA Townsuxo.

beading shaft mounted at one end in the boxing and antifrietionally supported between .the j'ournaled end o the being provided between-said shafts to receive'th e main interlocking beading means, the milled portion of the shaft milled portion of said other shaftbeing adapted to swa'ge o In testimony whereof, I have hereunto set my .hand at. 

